Metal-working machinery



Feb. 5, 1929.

H. BAERBALCK METAL WORKING MACHINERY Filed Dec. 20, 1926 2 Sheets-Sheet 1.

5891// lf3 //4 130 83 92 l/2 9/ /24 Feb. 5, 1929.

H-. BAERBALCK METAL WORKING MACHINERY Filed Deo. 20. 1926 2 Sheets-Sheet Patented Feb. 5, 1929.

UNITED STATES PATENT OFFICE.

HANS BAERBALCK, OF CINCINNATI, OHIO, ASSIGNOR TO THE AMERICAN TOOL WORKS COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

METAL-WORKING MACHINERY.

Application filed December 20, 1926. Serial No. 155,964.

My invention relates to indicating means for indicating the adjustments of travel of a reciprocating member, and to means for maintaining the adjusted parts in adjusted relations.

I have exemplified my invention as applied to a metal shaping machine employing a reciprocating ram and a rocker-arm for reciprocating the ram, the motive agency for the rocker-arm being a crankpin adjustable with relation to its axis of rotation t'or qualifying the iength of stroke ot' the rain, the indicating means being employed to indicate the adjustments ot the crank-pin; further means being employed to maintain the parts in adjusted relations.

It is the object of my invention to provide novel means arranged tor operating in novel manner whereby the adjustments ot the crank-pin are indicated in convenient position for the operator, so that the adjustments made may be readily read by the operator while making the adjustments; and, further, to provide novel means for holding the parts in adjusted relations.

The invention will be further readily understood from the following description and claims. and from the drawings, in which latter:

Fig. 1 is a vertical axial section of my improved device, taken in the plane of the line 1 1 of Fig. 3, and partly broken away.

Fig. 2 is a plan view showing a detail of the same.

Fig. 3 is a side elevation. partly in section. taken in the plane of the line 3-3 of Fig. 1, partly broken away.

Fig. 4 is a cross-section of my improved device, taken in the plane of the line 4-4 of Fig. 1.

Fig. 5 is a cross-section of the same, taken in the plane of the line 5 5 of Fig. 1.

Fig. 6 is a cross-section of the same, taken in the plane of the irregular line 6-6 of Fig. 1.

Fig. 7 is an enlarged axial section, similar to Fig. 1. partly broken away; and.

8 is a perspective view of the handle, partly broken away.

The shaping machine exemplified comprises a usual frame l1, on which there is an upper guideway 12. A tool-ram 13 is ieciprocated lengthwise in the guideway, and is arranged to carry a usual tool-holder at its end for receiving the tools. The ram is reciprocated by a usual rocker-arm 14, pivoted at its lower end on a shaft 15, supported in bearings 16 in the frame. The upper end of the rocker-arm is articulated at 17 with a link 18, which latter is articulated at 19 with a nut-block 20.

The nut-block is adjustable lengthwise of the ram by means ot' a screw-rod 25, threaded in the nut-block, and journaled and held endwise in usual manner in the ram, the nut-block being clamped in adjusted positions to the ram by means of a handle 2G, in usual manner, for positioning the path of stroke ot' the tool-ram.

The rocker-arm is provided with a usual longitudinal guideway 29, in which there is a slide-block 30, which forms a bearing for the crank-pin 31 journaled therein. The crank-pin is on a bull-wheel 32. suitably r0- tated at selective speeds, as by having a suitable drive pinion driven at selective speeds meshing with the gear-teeth 33 thereon.

The stroke of the tool, that is, the distance which the tool moves at each reciprocation of the rocker-arm 14. is governed by the position of the crank-pin 31 with relation to the axis of rotation of the bull-wheel. The adjustment of the crank-pin is effected by mounting the crank-pin on a slide-block 35, which is adjustable lengthwise in a dovetailed guideway 36 in the bull-wheel. The block 35 has a threaded bearing 37, an adjusting screw 38 being threaded therethrough.

The adjusting screw is journaled and held endwise in a` bearing 39 on the bull-wheel, and is rotated by a bevel pinion 4() fixed thereon, with which a bevel pinion 41 meshes. The bevel pinion 41 is fixed on an adjusting shaft 42. .i

The hub 45 of the bull-wheel has a bushing 46 therein. which is fixed to the bullwheel by a screw 47, so as to rotate with the bull-wheel. A block 48 is fixed to this bushing, as by a positioning screw 50. between a hub 51 of the block and the bushing.

The hub of the bull-wheel is rotatable in a bearing 54 ot the trame of the machine, in which a bushing 55 is located.

A bearing-sleeve 56 is fixed to the bearing 54 by screws 57, the bearing-sleeve having an annular' flange 58 through which the screws are received. The fiange spans the outer end of the hub of the bull-wheel, and the 88 in the shell 69.

bearing-sleeve forms a bearing for the outer end of the bushing 46 fixed to the bull-wheel. The bull-wheel is held endwise in the bearing 54.

A housing 61 comprises an inner section 62 and an outer section 63 connected by screws 64. It has a bearing 65 about the bearing-sleeve 56 and a sleeve extension 66, which latter` forms a housing for the indicating means.

A shell 69 has a flange 70, by means of which it is secured, as by bolts 71, to the block 48, so as to rotate with the bull-wheel.

A bushing 72 is received about a hub 73 on the block 48 about the shaft 42, and is located endwise between the block 48 and an inner annular shoulder 74 on the shell 69. The shell is positioned concentrically about the axis of the adjusting shaft 42, and the adjusting shaft is held endwise with relation to the bevel-pinions 40, 41.

A collar 75 is connected with the adjusting shaft so as to rotate therewith. This is effected in the present instance by providing the outer end portion of the adjusting shaft with a longitudinal spline-groove 76, in which a key 77 is received, the collar being provided with a complemental groove 7 8 for receiving said key.

The outer periphery of the collar 75 is provided with vscrew threads 79. and the inner periphery of the shell 69 is provided with internal threads 80 complemental to the threads 79. When the adjusting shaft is rotated, the collar 75 rotates therewith, and, by means of its threaded connection with the inner periphery of the relatively stationary shell 69, the collar 75 is also moved endwise along the adjusting shaft.

A ring 83 is connected with said collar and moves endwise with the collar. This ring is shown received in an annular groove 84 in the collar. The collar is provided with a removable section 85, which forms one wall of said groove, so that the ring may be re ceived in the groove and the removable section be fixed in place, as by a screw 86.

Pins 87 extend radially from the ring. being shown as screws threaded in said ring and extending through longitudinal slots A collar 89 is located about said shell and moves lengthwise along its outer' periphery, and is connected with said pins so as to be moved lengthwise by said pins, said pins being shown received through holes 90 in said collar.

A block 91, shown as a segment-block, is received about the outer periphery of the shell, and has connection, shown as a segmental tongue and groove connection 92, with the collar 89, so as to transmit the axial movements of the collar 89 to said block 91, and permit oscillatory movements of the housing 66 about the shell. The block is held and moves lengthwise with relation to said shell in a guide formed by the outer periphery of the shell and the inner periphery of the housing 66.

The housing 66 is normally stationary about the shell, but is permitted to have slight oscillatory or rotative movement about the shell. The housing is a part of the means for feeding the work, and is normally held stationary with relation to the frame, but may have safety oscillatory movements imparted thereto about the bearing-sleeve 56. lVhen such oscillatory movements take place, the block 91 oscillates upon the collar 89 so as to maintain the stroke adjustment and its indication without change.

The housing is permitted to resiliently yield to undue strains upon the feeding mechanism, and to be held in normal position by a spring 95, the ends of which are received in thimbles 96, 97, provided with enlargements forming annular shoulders 98, 99, the enlargements having endwise movements in a bore 100 of a lever 101, which is an element of the feeding means. Collars 102, 103, are fixed to the sides of said lever, as by screws 104, and form coacting shoulders for the shoulders 98, 99. A shank 105 is provided with heads 106, 107, arranged to abut the side walls 108, 109, of said housing. The housing is normally held in stationary position during the feeding movements, but, upon undue strain, the housing is arranged to rock about the bearing sleeve 56, and to return to normal position upon release of said undue strain.

The feeding movements are obtained b v rotation of the block 48, which is an eccentric block, imparting rocking movements to a. feeding lever pivoted on the housing, as more fully shown and described in Letters Patent No. 1,637,969, A. hf. Sosa, dated August 2, 1927, for feeding mechanism for metal working machinery. This patent also more fully shows and describes the housing and spring construction herein above described.

The block 91 is provided with an indicating finger' 111, which is shown fixed to said block by screws 112, the indicating finger being provided with a shank 113 received through a slot 114 extending lengthwise through the housing 66. The indicating linger is arranged to register with the morkings of a scale 115, to indicate the adjust ments of length of stroke of the tool-ram made b v the adjusting shaft 42. when adjusting the distance of the crank-pin 81 from the axis of rotation of the bull-wheel. The indicating scale is shown on an indicating plate secured upon one of the walls of the slot 114 by screws 116. A cover plate 117 is secured, as by screws 118, to the other wall of said slot, and is received over the slot 114.

A socket-piece 121 is secured to the outer end of the shell 69, and forms an extension of the same, The socket-piece is provided with a rabbet 122, in which the outer end of the shell is received, a shoulder 123 at the end of said rabbet mating with the outer end of the shell. Screws 124 secure said socket-piece and the outer end of the shell together.

A plunger' 125 is received about the outer end of the adjusting shaft 42, and is rotatively held thereto, as by means of a key 126 received in a key-way 12T in said plunger and in thc spline-groove 76. A spring 128 is received about the hub 129 of said plunger and is located between the flange 130 of said plunger and the bottom wall 131 of the socket 132 in the socket-piece, for normally urging the plunger outwardly. The hub of the plunger and the spring are arranged to be received in said socket to desirable extent.

A cap 135 is received crosswise of the outer end of the socket-piece, being secured thereto by screws 136` and forms an inwardly extending flange for the outer end ofthe socket-piece. A clutch 13T, shown as a. tooth-clutch, has its teeth located ref; ctively on the plunger and the 'ap so as to hold said plunger in angular position with relation to the socket-pieae when the clutch is engaged` for tiXing the shell (il) and the adjusting shaft 42 in rotative relation when said clutch is engaged, and permitting rotation of the adjusting` shaft 42 with re ation to the shell when said clutch is disengaged.

The teeth of the clutch are preferablv fine teeth so that upon minute rotative adjustments of the adjusting shaft 42 with relation to the shell, and consequently with relation to the bull-wheel, being made, the teeth of the clutch will be reengaged in new relations after suoli adjustments are completed.

The outer end of the shaft is formed to receive a suitable wrench, and the wrench is so formed and it and the clutch collar or plunger are so related that when the wrench is connected with the adjusting shaft 42 for making an adjustment` it also releases the clutch 137 for permitting the desired relative rotation between the operating shaft and the shell, and consequently between the operating shaft and the bull-wheel,

Thus a wrench 141 is provided with a handle 142 and with a socket-piece'l-l). arranged to be received about the outer end of the adjusting shaft to sufficient extent to push the plunger 125 inwardly and thereby disengage the clutch, the wrench being received through ahole 144 in the cap 1535. The outer end of the adjusting shaft is shown as square endedry the inner end of Vthe socket of the wrench being complemeially formed to eoact therewith for turning` :he adjusting shaft.

I do not herein specifically claim the clutch mechanism, having shown. described and claimed the same in a copendii'ig application for improvements in metal working machinery, tiled December 20th, 1926, as Serial No. 155,965.

In operation, the bull-wheel rotates and carries the crank-pin with it in its rotations, for rocking` the rocker-arm, and consequently reciprocating the tool-ram. The length of stroke of the tool-rain is determined by the distante of the crank-pin from the aXis of rotation of the bull-wheel. During rotation of the bull-wheel, the hub 45 thereof and the bushing 46, as well as the shell 69, the socket-piece 121 thereof, the clutch 137,r the plunger 125, the adjusting shaft 42, and the threaded collar 75, rotate with the bull-wheel, the ring 83 remaining lion-rotative in its annular groove in the threaded collar.

Then it is desired to adjust the stroke of the tool-ram. which may be effected while the tool-ram is reciprocating or at rest, the wrench is pushed inwardly about the outer end of the adjusting shaft for pushing' the plunger 125 and disengaging the clutch 13T', and engaging the compleinental faces of the 'rench and adjusting shaft, whereupon rotation is imparted to the adjusting shaft 42 by means of the wrench, in either dircctior. relatively to the shell G9. for causing either a longer or a shorter stroke of the tool-ram.

Such rotation of the adjusting shaft 42 rotates the threaded collar 75 with relation to the, shell. thereby effecting axial movement ot' the threaded collar in desired direction along' the adjusting` shaft 42, by reason of the connection of the threaded outei periphery otl said collar with the threaded inner periphcifiy of the shell. the extent of such adjustment being indicated simultaneously by movement of the indicating finger 111 lengthwise of the scale 115` the adjustment being continued until the desired length of stroke of the tool-ram is indicated by the position of the indicatii'ig finger on the scale. whereupon the wrench is withdrawn. and the clutch is automatically rcengaged in the new relation between the ad iusting shaft. the crank pin and the bullwheel.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is:

l. In mechanism of the character de scribed, the combination with a power tran-1- mitting crank member comprising a crzinli` adjustable toward and from its axis of rotation, of an adjusting shaft, au interna threaded shell surrounding said shaft. l shaft rotatable with relation to said shell for adjusting said crank, an inttinall threaded shell surrounding said i-zhaft, an externally threaded part complemental te the internal threads of said shell, the in tern-al threads of said shell and the external threads of said part spaced from said shaft by the body of said part, said part having connection with said shaft whereby said part is rotated with said shaft by said shaft and is permitted to be fed lengthwise along said shaft by said threads upon rotation of said shaft, said shaft, palt and shell concentrically arranged, and an indicating element having operative connection with said part for receiving indicating nn'wements.

2. In mechanism of the character described, the combination with a rotative power transmitting member, and a power transmitting crank on said member adjustable toward and from the axis oi rotation of said member, of an adjusting shaft for said crank whose axis of rotation is coincident with said irst-named axis` an internally threaded shell about said shaft spaced from said shaft and arranged to rotate willi said member, an externally threaded part complemental to said internally thr-aded shell, said externally threaded part having connection with said shaft, said connection causing said exti-riially threaded part to rotate with said shaft, said externally threaded part shiftablc by the threads of said shell and said part along said shaft, the internal threads of said shell and the external threads of said part spaced from said shaft by the body of said part, a housing about said shell, and a comj'ilemental scale and pointer forming a pair of indicating elements, one ot which is located on said housing and the other of which has operalive connection with said part.

3. In mechanism of the character described` the combination with a rotative power transmitting member, a power transmitting crank on said member adjustable toward and from the axis of rotation of said member, an adjusting shaft whose axis of rotation is coincident with said firstnamed axis, an internally threaded shell arranged to rotate with said member, an externally threaded part eomplemental to said internally threaded shell, the internal threads lof said shell and the external threads of said part spaced from said shaft by the body of said part, said shaft. shell and part concentrically arranged, connecting means connecting said shaft and said part causing said part to rotate with said shaft and to permit shifting of said part in axial directions along said shaft, an indicating scale, a pointer therefor having operative connection with said part, a relatively stationary support, and a guide on said support parallel with said axis of rotation for guiding said pointer.

4. In mechanism of the character described, the combination with a tool-ram, a rotative power transmitting member therefor, a power transmitting crank thereon adjustable toward and from the axis of rotation of said member, an adjusting shaft for adjusting said crank, an internally threaded shell arranged to rotate with said member', a housing thereabout, said internaily threaded shell and said housing pr vided with parallel slots extending lengthwise of said shell and said housing, an externally threaded part complemental to said internally threaded shell, the internal threads of said shell and the external threads of said part spaced from said shaft by the body of said part, said housing, sha't t, shell and part coneentrically arranged, conneeting means connecting said part and said shaft to cause said part to rotate with said shaft and to permit shifting of said part in axial directions along` said shaft, acollar movable axially with said part, said part having rotative connection with said collar, a collar about said sheil, connecting means between said collars in said slot in said shell, said connecting means guided by the walls of said slot, said housingl provided with an indicating scale and a finger having attachment with said second-nannal collar and extending through said slot in said housing for coactive relation with said scale and indicating on said scale the rmiprocating movements of said toot-ram.

5. In mechanism of the character described. the combination with a power transmitting crank member comprising a crank adjustable toward and from its axis of rotation, olf a normally stationary housing capable of oscillating, an adjusting shalt for said crank therein, a pair of complemental indicating elements, one of said elements located on said housing, and feeding means having operative connection with said shaft for feeding the other of said elements relative to said one of said elements, said feeding means received through the wall of said housing for similar movements ot said other of said elements relative to said one of said elements throughout rest position and oscillating movements of said housing.

(3. In mechanism of the character describedv` the combination with a reciprocating tool-ram and a power transmitting crank member for operating said tool-ram, said crank member comprising a crank adjustabie toward and from its axis of rotation, ol a normally stationary housing capable of oscillating, an adjusting shaft for said crank therein, a pair ot" complemental ii'ulicating elements, one of said elements located on said housing, a controlled member, and means for feeding said controlled member lengthwise of said shaft by rotation of said shaft, said controlled member having operative connection with the other of said elements, and said other of said elements received through said housing for movement relative to said one of said elements whereby to indicate the adjustments ot stroke of said tool-ram throughout rest position and oscillating movements ot` said housing.

7. In mechanism ot the character described, the combination with a power transmitting crank member comprising a crank adjustable toward and t'rom its axis of rotation, of an internally threaded shell, an adjusting shaft in said shell rotatable with relation thereto for adjusting said crank, an externally threaded part complemental to the internal threads of said shell and having connection with said shaft whereby said part is fed lengthwise alone' said shaft by said threads upon rotation oil; said shaft, the internal threads of Said shell and the external threads ot said part spaced from said shaft b v the body oi said part, said shaft, part and shell concentrieally ranged, an indicating element having operative connection with said part, a clutch between said shell and said shatt comprising a clutch collar arranged to rotate with said shaft and movable axially therealong by a turning tool when rotating said shatt to shift said indicating element, and resilient means returning said clutch collar into clutch relation for fixing said indicating element.

8. In mechanism of the character described, the combination with a power transmitting crank member comprising a crank adjustable toward and from its axis of rotation` of an internally threaded shell, an adjusting shaft in said shell rotatable with relation thereto for adjusting said crank, an externally threaded part complemental to the internal threads ot said shell and having connection with said shaft whereby said part is rotated by said shaft and is fed lengthwise along said shaft by said threads upon rotation ot said shaft, the internal threads of said shell and the external threads ot' said part spaced 'trom said shaft by the body ot' said part, said connection causing said shaft and said part to rotate together, said shaft. part and shell concentrieally arranged, au indicating element having operative connection with said part for receiving indicating movements, a clutch between said shaft and said shell comprising a moval le member arranged for relea-e relation by a turning tool when re ceived about said shaft for turning said shaft. aad means automatically returning said clutch member into engaged relation upon removal of said turning tool.

In testimony whereof, I have hereunto signed my name.

HANS BAERBALCK.

CERTIFICATE OF CORRECTION.

Patent No. 1,700,966. Granted February 5, i929, to HANS nAERALcK.

it is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2. lines 118 und 119, for the word "markings" read "markings; page 3, lines 125 and l26, claim l. strike out the words and comme "an internally threaded shell surrounding said shait,"; and that the said Letters Patent should be read with these corrections therein that the same may` conform to the record of the case in the Patent Office.

Signed and sealed this 26th day -oi Febrnary, A. D. 1929.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

